1-Piperazinecarbothioic acid, 4-(2-pyridinyl)-, [1-(2-pyridinyl)ethylidene]hydrazide, dihydrochloride 4-(2-PYRIDINYL)-1-PIPERAZINECARBOTHIOIC ACID, [1-(2-PYRIDINYL)ETHYLIDENE]HYDRAZIDE, DIHYDROCHLORIDE 71555-55-0 NSC348977